ALL CLEANING REMOVES SOME SURFACE METAL AND PATINA. THEREFORE, USE
CAUTION, AS EXCESSIVE CLEANING CAN REMOVE THE TEXTURE AND FINISH OF
THE METAL.

THE CLEANING OR STRIPPING OF METALS MAY INVOLVE THE USE OF
ABRASIVES, LIQUIDS OR SOLVENTS WHICH MAY SPLASH OR RUN OFF ONTO
ADJACENT MATERIALS. TAKE SPECIAL CARE TO PROTECT ALL ADJACENT
MATERIALS, AND DO NOT USE THIS PROCEDURE ON METALS OTHER THAN
THOSE
SPECIFIED IN THE SUMMARY.

PART 1---GENERAL

1.01 SUMMARY

A. This procedure includes guidance on cleaning and
polishing solid brass. This includes
both lacquered and
unfinished brass.

B. For additional guidance relating to cleaning and
maintaining brass, see the following
procedures:

1. For cleaning and polishing
brass-plate, see 05010-03-P.

2. For removing old lacquer or
paint from solid brass
or brass-plate, see 05010-31-R.

3. For removing patina or tarnish
from solid brass,
see 05010-32-P.

4. For applying a protective
coating to brass-plate or
solid brass, see 05010-12-P.

C. Brass is an alloy of copper and zinc. Brass-plate
is a
thin layer of brass bonded to steel.
Solid brass is more
durable than brass-plate and, therefore,
can withstand
more rigorous methods of cleaning.

D. Brass may be unfinished or lacquered. Architectural
brass hardware and trim is generally
maintained in a
highly polished, "bright"
finish.

1. Unfinished brass MUST be polished
frequently in
order to maintain its
luster. All polishing,
however, removes some
brass.

2. Lacquered brass will usually
last about 10 years
and does NOT require
frequent polishing.

3. Lacquer protects the brass
finish from
deterioration, though
some brilliance of its
surface characteristics
is sacrificed. Removal and
reapplication of the
lacquer, however, will not
harm the brass surface.

E. See 01100-07-S for general project guidelines
to be
reviewed along with this procedure.
These guidelines
cover the following sections:

1. Safety Precautions

2. Historic Structures Precautions

3. Submittals

4. Quality Assurance

5. Delivery, Storage and Handling

6. Project/Site Conditions

7. Sequencing and Scheduling

8. General Protection (Surface
and Surrounding)

These guidelines should be reviewed
prior to performing
this procedure and should be followed,
when applicable,
along with recommendations from the
Regional Historic
Preservation Officer (RHPO).

NOTE: Chemical products are sometimes sold under a
common
name. This usually means that the substance is not
as pure as
the same chemical sold under its chemical name. The
grade of
purity of common name substances, however, is usually adequate
for stain removal work, and these products should be purchased
when available, as they tend to be less expensive. Common
names are indicated below by an asterisk (*).

NOTE: WHEN CLEANING, TRY TO RETAIN THE BRASS PATINA,
AS THIS
PROTECTS THE BRASS FROM FURTHER CORROSION.

NOTE: PERFORM EACH CLEANING, POLISHING, AND COATING
METHOD
INDICATED IN A MANNER WHICH RESULTS IN UNIFORM COVERAGE
OF ALL
SURFACES, INCLUDING CORNERS, MOLDINGS AND INTERSTICES, AND
WHICH PRODUCES AN EVEN EFFECT WITHOUT STREAKING OR DAMAGE
TO
ADJACENT SURFACES.

A. For unlacquered solid brass:

1. Apply brass cleaner (liquid,
wadding or solid)
using a clean, soft cloth,
or use a jeweler's rouge
pad. Apply cleaner
to a small area at a time.
Buff along the grain
of the metal using a clean,
soft cloth.

2. Quickly remove the cleaner
by buffing the area with
a clean, soft cloth.

3. Use a pointed orangewood stick
to remove excess
polish/cleaner from crevices
and corners.

4. If staining occurs from the
chemical cleaner,
repeat the process.

5. To slow down the process of
tarnishing, apply a
lacquer (see 05010-12-P
for guidance).

-OR-

Apply a silicone coating
such as "Slipit". Follow
manufacturer's instructions
for application.

B. For lacquered solid brass:

1. Clean using ONLY a mild detergent
and water.

CAUTION: DO NOT
USE AMMONIA-BASED CLEANERS ON
LACQUERED BRASS. THEY
WILL DETERIORATE THE
COATING.

2. Rinse thoroughly and dry with
a clean, soft cloth.

3.04 ADJUSTING/CLEANING

A. During the work, remove from the site discarded
cleaning
and coating materials, rubbish, cans
and rags at end of
each work day.

B. Upon completion of coating work, remove all protective
coverings and coatings, and clean window
glass and other
coating-spattered surfaces. Remove
spattered coatings by
proper methods as recommended by coating
manufacturer,
using care not to damage adjacent surfaces.